top ring gap .0065" per inch of bore. 2nd comp ring same as normal which for me is .003" per inch of bore. I do not go with the fad that the 2nd comp ring needs to have a way larger gap to let gasses escape. the top ring having a gap of (.004") per inch of bore and 2nd ring (.003") per inch of gap has worked well for decades with the only change needed with the KB hypers is the top ring needing even more because of the KB's design.